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InvenTree/InvenTree/part/migrations/0089_auto_20221112_0128.py
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Oliver 06266b48af Part pricing cache (#3710) 
* Create new model for storing Part pricing data

Currently this model does not "do" anything but will be used for caching pre-calculated pricing information

* Define function for accessing pricing information for a specific part

* Adds admin site support for new PartPricing model

* Specify role for PartPricing model

* Allow blank values for PartPricing model fields

* Add some TODO entries

* Update migration files to sync with latest master

* Expose API endpoint for viewing part pricing information

* Update migration file

* Improvements:

- Updated model with new fields
- Code for calculating BOM price
- Code for calculating internal price
- Code for calculating supplier price
- Updated unit testing

* Fix (and test) for API serializer

* Including min/max pricing data in part serializer

* Bump API version

* Add pricing overview information in part table

- Adds helper function for formatting currency data
- No longer pre-render "price strings" on the server

* Overhaul of BOM API

- Pricing data no longer calculated "on the fly"
- Remove expensive annotation operations
- Display cached price range information in BOM table

* Filter BOM items by "has pricing"

* Part API endpoint can be filtered by price range

* Updpated API version notes

* Improvements for price caching calculations

- Handle null price values
- Handle case where conversion rates are missing
- Allow manual update via API

* Button to manually refresh pricing

* Improve rendering of price-break table

* Update supplier part pricing table

* Updated js functions

* Adds background task to update assembly pricing whenever a part price cache is changed

* Updates for task offloading

* HTML tweaks

* Implement calculation of historical purchase cost

- take supplier part pack size into account
- improve unit tests

* Improvements for pricing tab rendering

* Refactor of pricing page

- Move javascript functions out into separate files
- Change price-break tables to use bar graphs
- Display part pricing history table and chart
- Remove server-side rendering for price history data
- Fix rendering of supplier pricing table
- Adds extra filtering options to the SupplierPriceBreak API endpoint

* Refactor BOM pricing chart / table

- Display as bar chart with min/max pricing
- Display simplified BOM table

* Update page anchors

* Improvements for BOM pricing table display

* Refactoring sales data tables

- Add extra data and filter options to sales order API endpoints
- Display sales order history table and chart

* Add extra fields to PartPricing model:

- sale_price_min
- sale_price_max
- sale_history_min
- sale_history_max

* Calculate and cache sale price data

* Update part pricing when PurchaseOrder is completed

* Update part pricing when sales order is completed

* Signals for updating part pricing cache

- Whenever an internal price break is created / edited / deleted
- Whenever a sale price break is created / edited / deleted

* Also trigger part pricing update when BomItem is created  / edited / deleted

* Update part pricing whenever a supplier price break is updated

* Remove has_complete_bom_pricing method

* Export min/max pricing data in BOM file

* Fix pricing data in BOM export

- Calculate total line cost
- Use more than two digits

* Add pricing information to part export

Also some improvements to part exporting

* Allow download of part category table

* Allow export of stock location data to file

* Improved exporting of StockItem data

* Add cached variant pricing data

- New fields in part pricing model
- Display variant pricing overview in "pricing" tab

* Remove outdated "PART_SHOW_PRICE_HISTORY" setting

* Adds scheduled background task to periodically update part pricing

* Internal prices can optionally override other pricing

* Update js file checks

* Update price breaks to use 6 decimal places

* Fix for InvenTreeMoneySerializer class

- Allow 6 decimal places through the API

* Update for supplier price break table

* javascript linting fix

* Further js fixes

* Unit test updates

* Improve rendering of currency in templates

- Do not artificially limit to 2 decimal places

* Unit test fixes

* Add pricing information to part "details" tab

* Tweak for money formatting

* Enable sort-by-price in BOM table

* More unit test tweaks

* Update BOM exporting

* Fixes for background worker process

- To determine if worker is running, look for *any* successful task, not just heartbeat
- Heartbeat rate increased to 5 minute intervals
- Small adjustments to django_q settings

Ref: https://github.com/inventree/InvenTree/issues/3921
(cherry picked from commit cb26003b92)

* Force background processing of heartbeat task when server is started

- Removes the ~5 minute window in which the server "thinks" that the worker is not actually running

* Adjust strategy for preventing recursion

- Rather than looking for duplicate parts, simply increment a counter
- Add a "scheduled_for_update" flag to prevent multiple updates being scheduled
- Consolidate migration files

* Adds helper function for rendering a range of prices

* Include variant cost in calculations

* Fixes for "has_pricing" API filters

* Ensure part pricing status flags are reset when the server restarts

* Bug fix for BOM API filter

* Include BOM quantity in BOM pricing chart

* Small tweaks to pricing tab

* Prevent caching when looking up settings in background worker

- Caching across mnultiple processes causes issues
- Need to move to something like redis to solve this
- Ref: https://github.com/inventree/InvenTree/issues/3921

* Fixes for /part/pricing/ detail API endpoint

* Update pricing tab

- Consistent naming

* Unit test fixes

* Prevent pricing updates when loading test fixtures

* Fix for Part.pricing

* Updates for "check_missing_pricing"

* Change to pie chart for BOM pricing

* Unit test fix

* Updates

- Sort BOM pie chart correctly
- Simplify PartPricing.is_valid
- Pass "limit" through to check_missing_pricing
- Improved logic for update scheduling

* Add option for changing how many decimals to use when displaying pricing data

* remove old unused setting

* Consolidate settings tabs for pricing and currencies

* Fix CI after changing settings page

* Fix rendering for "Supplier Pricing"

- Take unit pricing / pack size into account

* Extra filtering / ordering options for the SupplierPriceBreak API endpoint

* Fix for purchase price history graph

- Use unit pricing (take pack size into account)

* JS fixes
2022-11-14 15:58:22 +11:00

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# Generated by Django 3.2.16 on 2022-11-12 01:28
import InvenTree.fields
import common.settings
import django.core.validators
from django.db import migrations, models
import django.db.models.deletion
import djmoney.models.fields
import djmoney.models.validators
class Migration(migrations.Migration):
dependencies = [
('part', '0088_alter_partparametertemplate_name'),
]
operations = [
migrations.AlterField(
model_name='part',
name='base_cost',
field=models.DecimalField(decimal_places=6, default=0, help_text='Minimum charge (e.g. stocking fee)', max_digits=19, validators=[django.core.validators.MinValueValidator(0)], verbose_name='base cost'),
),
migrations.AlterField(
model_name='partinternalpricebreak',
name='price',
field=InvenTree.fields.InvenTreeModelMoneyField(currency_choices=[], decimal_places=6, default_currency='', help_text='Unit price at specified quantity', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Price'),
),
migrations.AlterField(
model_name='partsellpricebreak',
name='price',
field=InvenTree.fields.InvenTreeModelMoneyField(currency_choices=[], decimal_places=6, default_currency='', help_text='Unit price at specified quantity', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Price'),
),
migrations.CreateModel(
name='PartPricing',
fields=[
('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('currency', models.CharField(choices=[('AUD', 'Australian Dollar'), ('CAD', 'Canadian Dollar'), ('CNY', 'Chinese Yuan'), ('EUR', 'Euro'), ('GBP', 'British Pound'), ('JPY', 'Japanese Yen'), ('NZD', 'New Zealand Dollar'), ('USD', 'US Dollar')], default=common.settings.currency_code_default, help_text='Currency used to cache pricing calculations', max_length=10, verbose_name='Currency')),
('updated', models.DateTimeField(auto_now=True, help_text='Timestamp of last pricing update', verbose_name='Updated')),
('scheduled_for_update', models.BooleanField(default=False)),
('bom_cost_min_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('bom_cost_min', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Minimum cost of component parts', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Minimum BOM Cost')),
('bom_cost_max_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('bom_cost_max', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Maximum cost of component parts', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Maximum BOM Cost')),
('purchase_cost_min_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('purchase_cost_min', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Minimum historical purchase cost', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Minimum Purchase Cost')),
('purchase_cost_max_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('purchase_cost_max', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Maximum historical purchase cost', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Maximum Purchase Cost')),
('internal_cost_min_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('internal_cost_min', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Minimum cost based on internal price breaks', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Minimum Internal Price')),
('internal_cost_max_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('internal_cost_max', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Maximum cost based on internal price breaks', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Maximum Internal Price')),
('supplier_price_min_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('supplier_price_min', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Minimum price of part from external suppliers', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Minimum Supplier Price')),
('supplier_price_max_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('supplier_price_max', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Maximum price of part from external suppliers', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Maximum Supplier Price')),
('variant_cost_min_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('variant_cost_min', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Calculated minimum cost of variant parts', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Minimum Variant Cost')),
('variant_cost_max_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('variant_cost_max', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Calculated maximum cost of variant parts', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Maximum Variant Cost')),
('overall_min_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('overall_min', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Calculated overall minimum cost', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Minimum Cost')),
('overall_max_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('overall_max', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Calculated overall maximum cost', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Maximum Cost')),
('sale_price_min_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('sale_price_min', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Minimum sale price based on price breaks', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Minimum Sale Price')),
('sale_price_max_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('sale_price_max', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Maximum sale price based on price breaks', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Maximum Sale Price')),
('sale_history_min_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('sale_history_min', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Minimum historical sale price', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Minimum Sale Cost')),
('sale_history_max_currency', djmoney.models.fields.CurrencyField(choices=[], default='', editable=False, max_length=3)),
('sale_history_max', InvenTree.fields.InvenTreeModelMoneyField(blank=True, currency_choices=[], decimal_places=6, default_currency='', help_text='Maximum historical sale price', max_digits=19, null=True, validators=[djmoney.models.validators.MinMoneyValidator(0)], verbose_name='Maximum Sale Cost')),
('part', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, related_name='pricing_data', to='part.part', verbose_name='Part')),
],
),
]
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